Linear hearth furnace system and methods regarding same

Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal

Reexamination Certificate

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Reexamination Certificate

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07666249

ABSTRACT:
Systems and methods for use in processing raw material (e.g., iron bearing material) include a linear furnace apparatus extending along a longitudinal axis between a charging end and a discharging end (e.g., the linear furnace apparatus includes at least a furnace zone positioned along the longitudinal axis). Raw material is provided into one or more separate or separable containers (e.g., trays) at the charging end of the linear furnace apparatus. The separate or separable containers are moved through at least the furnace zone and to the discharging end where the processed material is discharged resulting in one or more empty containers. One or more of the empty containers are returned to the charging end of the linear furnace apparatus to receive further raw material.

REFERENCES:
patent: 1738039 (1929-12-01), Cope et al.
patent: 1868952 (1932-07-01), Simpson
patent: 1885381 (1932-11-01), Simpson
patent: 1936239 (1933-11-01), Kuhlman
patent: 2072072 (1937-02-01), Hartgen
patent: 2367262 (1941-04-01), Brassert
patent: 3212876 (1965-10-01), Hulthen et al.
patent: 3471134 (1969-10-01), Cone
patent: 3645321 (1972-02-01), Robinson
patent: 3658171 (1972-04-01), Fukada
patent: 3708157 (1973-01-01), Aubry et al.
patent: 3820946 (1974-06-01), Myoshi et al.
patent: 4082543 (1978-04-01), Beggs et al.
patent: 4421481 (1983-12-01), Holz et al.
patent: 4579319 (1986-04-01), Sasaki
patent: 4674975 (1987-06-01), Corato et al.
patent: 4778383 (1988-10-01), Strobel et al.
patent: 4778384 (1988-10-01), Lingl, Jr.
patent: 4834649 (1989-05-01), Levit et al.
patent: 4929177 (1990-05-01), Paul
patent: 5314169 (1994-05-01), Kamlani et al.
patent: 5648042 (1997-07-01), Miller, Jr.
patent: 5900208 (1999-05-01), Wittmer et al.
patent: 5961055 (1999-10-01), Lehtinen
patent: 5972066 (1999-10-01), Lehtinen
patent: 6036744 (2000-03-01), Negami et al.
patent: 6126718 (2000-10-01), Sawa et al.
patent: 6210462 (2001-04-01), Kikuchi et al.
patent: 6251156 (2001-06-01), Hoffman et al.
patent: 6251161 (2001-06-01), Tateishi et al.
patent: 6257879 (2001-07-01), Lu et al.
patent: 6270552 (2001-08-01), Takeda et al.
patent: 6413471 (2002-07-01), Kamikawa et al.
patent: 6447713 (2002-09-01), Monteyne
patent: 6506231 (2003-01-01), Negami et al.
patent: 7413592 (2008-08-01), Bleifuss et al.
patent: 2001/0027701 (2001-10-01), Ito et al.
patent: 2001/0037703 (2001-11-01), Fuji et al.
patent: 2001/0054329 (2001-12-01), Hoffman et al.
patent: 2006/0150772 (2006-07-01), Iwasaki et al.
patent: 2006/0150773 (2006-07-01), Iwasaki et al.
patent: 2006/0150774 (2006-07-01), Iwasaki et al.
patent: 2006/0150775 (2006-07-01), Iwasaki et al.
patent: 1134983 (1996-11-01), None
patent: 1501947 (1978-02-01), None
patent: 05-347349 (1993-12-01), None
patent: 2002-146511 (2002-05-01), None
patent: 99/51783 (1999-10-01), None
Asano et al., “Development of Al203-C Refractories for Iron-ore Smelting Reduction Furnace,” Taikabutsu, 1990; 42 (8) pp. 435-436 (English language abstract only).
BOLDet al., “Direct Reduction down Under: the New Zealand Story,” Iron and Steel International, 1977; 50(3) pp. 145 and 147-152.
Bryk et al., “Continuous Reduction of Iron Ore with Coal in an Electrically Heated Furnace,” Canadian Metallurgical Quarterly, 1986; 25(3) pp. 241-246.
Greene, “The Production of Steel Direct from Ore by the Hearth Furnace Method,” Mining World, 1944 pp. 31-33.
Hanewald, “Lessons Learned from INMETCO's 20 Years of RHF Experience,” presentation, Iron Ore for Alternative Iron Units 99, Charlotte, NC, Oct. 25-27, 1999 16 pages.
Hoffman et al., “A Look at Development of the FASTMELT Technology at the Midrex Technical Center,” Ironmaking Conference Proceedings, 1999 pp. 367-373.
Ichikawa et al., “Effective Use of Steelmaking Dust and Sludge by Use of rotary Hearth Furnace,” Nippon Steel Technical Report No. 86, Jul. 2002 pp. 35-38.
Inaba, “Overview of New Direct Reduced Iron Technology,” Journal of the Iron and Steel Institute of Japan, 2001; 87 (5) pp. 17-23 (English language abstract only).
Kamijo et al., “Production of Direct Reduced Iron by Sheet Material Inserting Metallization Method,” ISIJ International, 2001; 41, Supplement: S13-S16.
Kobayashi et al., “A New Process to Produce Iron Directly from Fine Ore and Coal,” I&SM, Sept. 2001 pp. 19-22.
“KSC Develops New Ironmaking Process,” l&SM, International Report Japan, Oct. 2001, 1 page.
Lepinski et al., “Producing Direct Reduced Iron utilizing Rotary Hearth Furnace,” Industrial Heating, 1994, pp. 28-31.
Lu, “RHF/SAF and Their Potential Successors,” presentation, Iron Ore for Alternative Iron Units 99, charlotte, NC, Oct. 25-27, 1999, 23 pages.
Matsumura et al., “The Reduction and Melting Behaviour of Carbon Composite Iron Ore Pellet on High Temperature,” Journal of the Iron and Steel Institute of Japan, 1998; 84(6) pp. 405-410 (English language abstract only).
Misra et al., “Development of Firing Schedule to Prepare Composite Pre-reduced (CPR) Pellets,” ISIJ International, 1994, 34(6) pp. 468-475.
Miyagawa et al., “Development of the FASTMET as a New Direct Reduction Process,” ICSTI/Ironmaking Conference Proceedings, 1998 pp. 877-881.
Negami, “Premium Iron Shot Making by ITmk3,” Beyond the blast Furnace, Atlanta Airport Marriott, Jun. 5-7, 2000, pp. 1, 3, 5, 7, 9.
Pandey et al., “Reducing Agents and Double-Layered Iron Ore Pellets,” Int. J. Miner. Process., 2000, 59 pp. 295-304.
Rinker, “Using the DRylron Process to Produce Value-Added Iron Units,” Minerals & Metallurgical Processing, 2001, 18(1), pp. 45-18.
Ross et al., “The Agglomeration of Iron-Ore Materials and Their Behaviour During Reduction,” Agglomeration 77, Proceedings of the 2nd International Symposium on Agglomeration, Atlanta, BA, Mar. 6-10, 1977, 1 pp. 336-355.
Sawa et al., “New Coal-Based Process, Hi-QIP, to Produce High Quality DRI for the EAF,” ISIJ International, 2001, 41,11 pages.
Sharma, “Composite Prereduced Pellet - New Feed for Iron and Steel Industry,” Ironmaking and Steelmaking, 1992, 19(5) pp. 372-376.
International Search Report for PCT/US05/34597. Published Jan. 3, 2008.
Written Opinion for PCT/US05/34597. Published Nov. 16, 2007.
Development of A1203-C Refractories for Iron-Ore Smelting Reduction furnace, Asano et al., 1990.
ASM Handbook, vol. 7, Powder Metallurgy, ASM International, 1984, pp. 351-359.
Machine translation of Japanese patent document 05-347349 published Dec. 1993.
Machine translation of Japanese patent document 2002-146511 published May 2002.
Webster's Seventh New Collegiate Dictionary, Merriam Co., 1965, p. 720.
Ishiwata et al., “Development of a New Reduction and Smelting Process in a Rotary Hearth Furnace,” AIST conference, Scrap substitutes and alternative Ironmaking IV, Oct. 2004, 24 pages.
Sumitomo Corporation, “Iron Dynamics Process—Flexible Iron Feed Stock Option,” Oct. 1998, 11 pages.

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